Can be used to retreive and display a list of bookmarks saved by a
given user.

This class based view accepts all the parameters that can be passed
to django.views.generic.detail.DetailView, with an exception:
it is not mandatory to specify the model or queryset used to
retreive the user (django.contrib.auth.models.User model is used
by default).

For example, you can add in your urls.py a view displaying all
bookmarks by a single active user: